One Huge Ad in Wide Skyscraper?

Anyone else see this?

[WolfLover]

I am looking at one of my product pages and I have the wide skyscraper on it. It is showing no adlinks at the top and it showing only one ad in the middle of the skyscraper with a really large font. Is this normal? I've not seen this happen before. I usually have 4 or 5 ads in the skyscraper.

[annej]

It's probably a site targeted ad rather than a contextual one. If it is a good one for your site leave it, otherwise filter it out.

[Lagamorph]

I see that rather often on one forum with 3 ad blocks. It seems to happen when they run out of ringtone and free rewards ads. So in that case I think it's over-saturation of their niche and simply running out of ads. Possibly you're displaying more than your adwords buyers can support?